50. According to the circuit, what is the equivalent resistance between points C and D?(A) 36Ω(B) 40Ω (C) 45Ω (D)60Ω

48. One aircraft that certificated as transport category by CAA or by civil aviation authority of the State of Design and prohibited for acrobatic operation is categorized as: (A)Commuter Category Aircraft (B)Transport Category Aircraft (C)Normal Category Aircraft (D)Utility Category Aircraft