Which of the following reactions an produce aniline as main product?

Question

(a) $C_6H_5N0_2+Zn /KOH$

(b) $C_6 H_5 NO_2+Z_n /NH_4 Cl$

(c) $C_6H_5 NO_2+LiAlH_4$

(d) $C_6H_5 NO_2+Zn /HCL$