91.The ozone layer in the upper part of the atmosphere protects us from

92.Milk fever in cows occurs due to the lack of

93.Which of the following statements regarding cellulose are correct ? 1. It is a naturally occurring organic substance found in plants. 2. It is used for making rayon. 3. It consists of long unbranched chain of glucose units.

94.Opium is obtained from

95.The freezer in a refrigerator is fitted near the top