1. Ordinary Portland Cement এর Initial Setting Time কত?

Which underlined part of the sentence is incorrect: He is not the $\frac{kind of a person }{a}$  who  $\frac{accepts}{b}$ $\frac{ such }{c}$ treatment  $\frac{passively.}{d}$

Find the underlined part that is incorrect: We  $\frac{can\text{'}t hardly }{a}$ believe that the situation is so  $\frac{serious as }{b}$ to  $\frac{justify }{c}$ such  $\frac{precaution}{d}$ 

Which underlined part of the sentence is incorrect: I $\frac{will }{a}$ $\frac{always }{b}$ remember  $\frac{you }{c}$ $\frac{s\tan ding }{d}$ by me and offering me encouragement

$\frac{F or nearly half a century}{ক}$ he lived in that village, $\frac{sharing}{খ}$ the joys and sorrows of the people there, but later he left the village and has not $\frac{been heard of \sin ce}{গ}.$ $\frac{No error}{ঘ}$

$\frac{H ardly had he}{ক}$ arrived when the $\frac{house caugth fire}{খ}$ and everything was $\frac{reduced to ashes }{গ}$ $\frac{No error}{ঘ}$ 

The superintendent of police has announced that $\frac{those who}{ক}$ are found guilty of breach of peace or $\frac{of taking}{খ}$ the law into their own will be taken to ... task. $\frac{No error}{ঘ}$

The Jungle boys $\frac{knows how}{ক}$ to $\frac{start engine}{খ}$ but does not $\frac{know to stop it }{গ}.$ $\frac{No error}{ঘ}$