Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Gypsum is used for making fireproof wall boards.

Reason (R) : Gypsum is unstable at high temperatures.

In the light of the above statements, choose the correct answer from the options given below :

Match List I with List II :

	List I		List II
A.	Slaked lime	I.	$$\mathrm{NaOH}$$
B.	Dead burnt plaster	II.	$$\mathrm{Ca(OH)_2}$$
C.	Caustic soda	III.	$$\mathrm{Na_2CO_3\cdot 10H_2O}$$
D.	Washing soda	IV.	$$\mathrm{CaSO_4}$$

Choose the correct answer from the options given below :

Choose the correct statement(s) :

A. Beryllium oxide is purely acidic in nature.

B. Beryllium carbonate is kept in the atmosphere of $$\mathrm{CO_2}$$.

C. Beryllium sulphate is readily soluble in water.

D. Beryllium shows anomalous behaviour.

Choose the correct answer from the options given below :

The element playing significant role in neuromuscular function and interneuronal transmission is :