Delhi : The CBI, on Sunday, summoned Delhi Chief Minister Arvind Kejriwal for questioning in the excise policy scam case. He was summoned on last Friday seeking his appearance as a witness before the investigation team to answer queries on the inputs, which were generated during the probe in which Kejriwal’s former deputy Manish Sisodia was also arrested on February 26. The CBI wisely chose Sunday for questioning as the neighbourhood comprising complexes having government office, remains closed, thus causing the least inconvenience to the officials coming here.