Which shows the least dipole moment [UPSEAT 2001; DPMT 1982]

1.	Which shows the least dipole moment [UPSEAT 2001; DPMT 1982]
A.	\[CC{{l}_{4}}\]
B.	\[CHC{{l}_{3}}\]
C.	\[C{{H}_{3}}C{{H}_{2}}OH\]
D.	\[C{{H}_{3}}COC{{H}_{3}}\]
Answer» B. \[CHC{{l}_{3}}\]

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Which shows the least dipole moment [UPSEAT 2001; DPMT 1982]

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