Which of the following is smallest order of class

The following sentence has been split into four segments. Identify the segment that contains a grammatical error.

Scarcely had (1)/ Veer finished (2)/ eating then he got (3)/ a stomach ache (4)/ No error (5)

Identify the segment in the sentence that contains the grammatical error from the given options.

Let us think how can we solve the problem amicably.

The sentence below is divided into five segments. Select the option that has an error, if any. 

The radio broadcasted (a)/ last night that (b)/ the temperature in Kashmir would go below 10°C. (c)/ No error (d) 

All the landmines, weighing among one kg to 10 kg were planted on the route to target security forces.

What is the function of the kidney in the body?

Select the segment which has a grammatical error .

Glutathione is regarded as one of the most important detoxifications agent in the human brain.

Choose the grammatically correct sentence.