Who among the following is a singer of Hindustani

The fall in (A)/the number of deaths from heart disease (B)/are generally attributed to (C)/improvements in diet (D).

If it will (A)/rains tomorrow, (B)/I will bring (C)/an umbrella to stay dry.(D)

Americans are accustomed to (a) / drinking coffee (b) / with their meals (c) / No error (d)

He denied to have (A)/any part in writing the information packs (B)/and advertisements and said they (C)/were largely available when he arrived (D).

During the summer vacation, we plan to visit several cities / to explore their rich history / and learning about / their cultural heritage.

Mischief are sure to (1)/crop up, in one form (2)/or another, among (3)/the idle and ambitionless (4).

Parts of the following sentence are given as options. Identify the segment that contains a grammatical error. 

Newborns in India have a least chance of survival than babies born in Afghanistan and Somalia.

Parts of the following sentence are given as options. Identify the segment that contains a grammatical error.