Match List - I with List - II and select the correct code given below the list:

Kretschmer's constitutional-typology theory of personality classifies individuals into physical-constitution types, each defined by a specific body build and associated temperament, rather than judging personality from behaviour alone.

Matching List-I with List-II by each type's defining build:

1. Pyknic is defined by a stocky, broad-chested, and sociable (popular) build -- matches description 1.

2. Aesthetic (the standard term is Asthenic/Leptosomic) is defined by a weak, tall, sensitive, and thin build -- matches description 2.

3. Athletic is defined by a strong, muscular build -- matches description 3.

4. Dysplastic is defined by a mixed constitution that does not reduce to one of the other three builds -- matches description 4.

Cross-check -- each of the other codes breaks at least one type's own defining build:

• a-2, b-3, c-4, d-1 gives Pyknic the slender build meant for Aesthetic, and gives Dysplastic the stocky build meant for Pyknic.

• a-3, b-2, c-4, d-1 gives Pyknic the muscular build meant for Athletic, and gives Dysplastic the stocky build meant for Pyknic.

• a-4, b-3, c-2, d-1 gives Pyknic the mixed-type label meant for Dysplastic, and gives Athletic the slender build meant for Aesthetic.

So the only code where every type is paired with its own defining build is a-1, b-2, c-3, d-4.