The reaction of sulphur in an alkaline medium is given below:

${\mathrm{S}}_{8\left(\text{\hspace{0.17em}s}\right)}+{{\mathrm{aOH}}^{-}}_{\left(\mathrm{aq}\right)}\to {{\mathrm{bS}}^{2-}}_{(\mathrm{aq})}+{\mathrm{cS}}_2{{\mathrm{O}}_3^{2-}}_{\text{(aq)\hspace{0.17em}}}+{\mathrm{dH}}_2{\mathrm{O}}_{\left(\mathrm{\ell }\right)}$

The value of 'a' is: 

Consider the following reaction :
\(a\mathrm{Cu}+b\mathrm{HNO}_{3} \rightarrow c\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+d\mathrm{NO}+e\mathrm{H}_{2} \mathrm{O}\)
The values of a, b, and e in the reaction are, respectively:
1. 3, 8 and 4
2. 5, 2 and 8
3. 5, 2 and 16
4. 2, 5 and 8