Before going to his bua's home, Gopal's mother told him to soak how much chana. 

Before going to Gopal's bus house, his mother told him to soak two bowls of chana. 

But he thought that two bowls of a gram would not be enough for eight people. So, he afterwards soaked two more bowls of a gram. 

Gopal's mother didn't tell Gopal to soak one bowl of a gram. 

Gopal's mother didn't tell Gopal to soak three bowls of a gram. 

Gopal's mother didn't tell Gopal to soak four bowls of a gram. 

Therefore, the correct answer is option(B).