The correct option is B 2 and 3 are correct
Indian Constitution is the lengthiest written Constitution of the World. Most of its provisions are taken from the Government of India Act, 1935 which itself was a detailed document passed in British India and from various countries of the world. The written Constitution has an advantage that it is very clear, precise and unambiguous while on the other handwritten provisions are hard to change with the changing necessity of time and become rigid principles.