Answer:
Option B
Explanation:
Given (6 Men +8 boys)$\times$10 = (26 men + 48 boys)$\times$2
60 men + 80 boys = 52 men + 96 boys
1 man = 2 boys
15 men + 20 boys = 30 boys +20 boys = 50 boys
6 men + 8 boys = 12 boys + 8 boys = 20 boys
$\therefore$ 20 boys = 10 days
50 boys = $x$
$x=\frac{(20\times 10)}{50}$ = 4 days