હેલીના ધૂમકેતુનો ભ્રમણકક્ષાનો સમયગાળો ______ વર્ષ છે. A. 25 B. 50 C. 76 D. 100

Halley's Comet returns roughly every 76 years (about 75–79). It was last seen in 1986 and will next appear in 2061.