(A): Hydrogen iodide is most stable among hydrogen halides
(R): Iodide is most powerful reductant among halides. 

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

D