Chair form of cyclohexane is more stable than boat form because :
A. In chair form carbons are in staggered form and in boat form carbons are in eclipsed form
B. In chair form carbons are in eclipsed form and in boat form all the carbons are in eclipsed form
C. Bond angle in chiar form is `111^(@)` and bond angle in boat form is `109.5^(@)`
D. Bond angle in chair form is `109.5^(@)` and in boat form `111^(@)`
