(A) Deep sea divers use helium-oxygen mixture for respiration
(R) Unlike nitrogen, helium is not soluble in blood even under high pressure.

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. Both (A) and (R) are false

Answer

A