121: The half-life of a radio active element is 5 years. The fraction of the radioactive substance that remains after 20 years is
(a) 1/2
(b) 1/4
(c) 1/8
(d) 1/16
122: Which one of the following was a corporation of merchants in ancient India ?
(a) Chaturvedimangalam
(b) Parishad
(c) Ashtadikgaja
(d) Manigrama
123: What is the system of governance in the Panchayati Raj setup ?
(a) Single-tier structure of local self-government at the village level
(b) Two-tier system of local self-government at the village and block levels
(c) Three-tier structure of local self-government, at the village, block and district levels
(d) Four-tier system of local self-government at the village, block, district and state levels
124: If a mouse of over eight times its normal size has been produced by introducing human growth hormone gene, the technique involved is called
(a) Hybridisation
(b) Genetic engineering
(c) Mutation Breeding
(d) Hormonal feeding
125: In India, the first bank of limited liability managed by Indians and founded in 1881 was
(a) Hindustan Commercial Bank
(b) Oudh Commercial Bank
(c) Pubjab National Bank
(d) Punjab and Sind Bank