57. Which is used for manufacturing chips? A) Bus B) Control unit C) Semiconductors D) A and b only 58. The value of each bead in heaven is A) 1 B) 3 C) 5 D) 7 59. The first computer introduced in Nepal was A) IBM 1400 B) IBM 1401 C) IBM 1402 D) IBM1402 60. Mnemonic a memory trick is used in which of the following language? A) Machine language B) Assembly language C) High level language D) None of above 61. Instruction in computer languages consists of A) OPCODE B) OPERAND C) Both of above D) None of above