The correct order of increasing metallic character of Na, Be, P, Mg and Si is :

(A) \(P<S i<B e<M g<N a\)
Metallic character is the tendency of an element to lose electrons. It decreases across a period from left to right and increases down a group.
The elements \(Na , Mg , Si\), and P belong to the third period. Across a period, metallic character decreases, so the order is \(Na > Mg > Si > P\).
The elements Be and Mg belong to Group 2. Down a group, metallic character increases, so \(Mg > Be\).
Comparing Be (a metal) with Si (a metalloid) and P (a non-metal), Be is more metallic than both Si and P .
Combining these observations, the increasing order of metallic character is \(P < Si < Be < Mg < Na\).