Seedlings with weak or unbalanced development of essential structures are referred to as

Correct option is B

Correct answer – (b)
Seedlings showing weak or unbalanced development of essential structures such as root or shoot are termed deformed seedlings.
Such seedlings are abnormal and unsuitable for healthy crop establishment.
They fail to grow into normal plants.
Information Booster / Facts
Deformed seedlings are identified during germination testing.
Why other options are incorrect
(a) Decayed seedlings are affected by rotting.
(c) Damaged seedlings suffer mechanical injury.
(d) Diseased seedlings are affected by pathogens.