[A] Mean, Median and Mode always coincide.
[B] Within ± 1.96 σ limits from Mean value, the area under the distribution is 99 percent of the total area.
[C] The area under the normal curve represents probabilities for the normal random variable and the total area for the normal probability distribution is one
[D] For every pair of values of Mean and Standard deviation, the curve of the distribution is bell-shaped and symmetric.