question_answer

Directions: in the following questions, you have passages where some of the words have been left out. First read the passage over and try to understand what it is about. Then, fill in the blanks with the help of the alternatives given. Smoking is the biggest preventable 251 to mankind. Many serious 252 including lung cancer, bronchitis and heart attack are 253 to smoking habits. Smoking in any form whether cigarette, cigar, pipe, bidi or tobacco chewing has been 254 as a major 255 factor for heart attack. A recent Soviet study has shown that smoking 256 a man's life span by 2250 days (over six years). The increasing 257 of heart attack in India, fast 258 among younger generation has been largely on 259 of smoking habits. Nearly 30 million people in the country are estimated to be 260 of heart disease.

A) proportion

B) degree

C) extent

D) account