Which of the following sentences is correct?

Identify the error in the sentence given below having three components marked as (i), (ii), and (iii) :

(i) I was disappointed (ii) when I came for seeing you last evening (iii) but could not find you at home.

Pick out the part of sentence which has an error. If there is no error, mark the option “No Error”.

A) Writing the letter, B) is often cheaper, C) than telephoning

Fill in the blanks by proper word in the sentence.

'He was frightened ______.'

Fill in the blank with a suitable word.

There are more things in heaven and earth ________ are dreamt of in our philosophy

Choose the option which best replaces the underlined phrase in more conventional English:

"He has not been able to make any significant impact, however, he behaves as if he is the supreme leader."

Pick the correct set of words to complete the following sentence:

Survival of mankind __________ is in danger due to _______ of atomic weapons.