Arrange the steps of biological sewage treatment process in a sequence.
(A) Vigorous growth of flocs and significant reduction in BOD
(B) Activated sludge pumped into anaerobic sludge digester
(C) Effluent passed into an aeration tank and agitated mechanically
(D) Effluent transfer to settling tank followed by sedimentation of bacterial flocs
Choose the correct answer from the options given below:

Read the following paragraph and answer the given questions.
Cancer detection is based on biopsy and histopathological studies. Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. Do you know why mother's milk is considered very essential for the new-born infant? The yellowish fluid colostrum secreted by mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. Different species of Plasmodium (P. vivax, P. malaria and P. falciparum) are responsible for different types of malaria. Of these, malignant malaria caused by Plasmodium falciparum is the most serious one and can even be fatal. The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Drugs like barbiturates, amphetamines, benzodiazepines, and other similar drugs, that are normally used as medicines to help patients cope with mental illnesses like depression and insomnia, are often abused. Morphine is a very effective sedative and painkiller, and is very useful in patients who have undergone surgery.
Malignant malaria is caused by -

Match List I with List II

List I (Drug)	List ll (Plant)
(A) Morphine	(I) Tobacco
(B) Cannabinoids	(II) Erythroxylum coca
(C) Cocaine	(III) Papaver somniferum
(D) Nicotine	(IV) Cannabis sativa

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Identify, which is not the sexually transmitted infection?

Which of the following is an example of homologous organs?

During the development of human embryo, which of the following hormone is NOT produced by placenta?

Observe the figures and answer the question.

The floating cover of bio-gas plant is usually made-up of _________.

Phenol can be distinguished from ethanol by the following reagent :

The feasible region of a LPP is bounded. The corresponding objective function is \(Z=6 x-7 y\). Then the objective function attains:

The area of the region bounded by \(y=2 x-x^2\) and \(x\)-axis is :

5 M sugar solution is \(30 \backslash \%\) sugar by mass. Calculated density of the solution will be, given that molecular weight of sugar is \(342 g mol ^{-1}\).

Insulin deficiency in human beings causes diabetes. Excess of which hormone causes an increase in blood pressure?

The differential equation of the family of parabolas \(y^2=4 a x\) where \(a\) is an arbitrary constant is :