That which is perceptible by touch is

Contagious
Contingent
Tenacious
Tangible

The correct answer is D. Tangible.

  • Contagious: able to be spread from one person to another, especially by a disease.
  • Contingent: dependent on the happening or non-happening of something else.
  • Tenacious: holding firmly to something; not easily let go.
  • Tangible: able to be touched or felt.

Of these, only tangible is perceptible by touch.