Given below are two statements : one is labelled as Assertion \((A)\) and the other is labelled as Reason \((R)\). Assertion \((A)\) : \(\alpha\)-halocarboxylic acid on reaction with dil. \(NH _3\) gives good yield of \(\alpha\)-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason \((R):\) Amino acids exist in zwitter ion form in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :

1. A Both \((A)\) and \((R)\) are correct and \((R)\) is the correct explanation of \((A)\).
2. B Both \((A)\) and \((R)\) are correct but \((R)\) is not the correct explanation of \((A)\).
3. C \((A)\) is correct but \((R)\) is not correct.
4. D \((A)\) is not correct but \((R)\) is correct.