( A ) There are three points in the cycle where $NAD^+$ is reduced to $NADH + H^+$
( B ) There is one point in the cycle where $FAD^+$ is reduced to $FADH_2$
( C ) The cycle starts with condensation of acetyl group (acetylCoA) with pyruvic acid to yield citric acid.
( D ) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
