The correct answer is (A) : 3s2, 3p4
Element E is Selenium
The element which is just above ‘E’ in periodic table is sulphur, its electronic configuration is 1s2, 2s2, 2p6, 3s2, 3p4.
\(E⇒[Ar]^3d^10^4s^24p^4\)
Element above \(E⇒[Ne]3s^23p^4\)
Method used for separation of mixture of products (B and C) obtained in the following reaction is: 
Which of the following best represents the temperature versus heat supplied graph for water, in the range of \(-20^\circ\text{C}\) to \(120^\circ\text{C}\)? 