He is always anxious.

Correct — A, worried. 'Anxious' means feeling nervous, uneasy or troubled about something uncertain, and 'worried' captures exactly that apprehensive, unsettled state of mind, so it is the word nearest in meaning.

Why the others are wrong

• (b)
  dispassionate — 'Dispassionate' means calm, detached and free of emotion — the opposite of the uneasy feeling in 'anxious'.
• (c)
  sluggish — 'Sluggish' means slow-moving or lacking energy; it describes pace, not a troubled state of mind.
• (d)
  torpid — 'Torpid' means inactive or lethargic; like sluggish it points to dullness, not worry.

This is a synonym item — pick the word nearest in meaning to 'anxious' (nervous, uneasy); the closest match is 'worried'.

No directly related past PYQ was found.

• practice — not a real PYQ

  Select the word nearest in meaning to 'apprehensive'.

  • (a)calm
  • (b)uneasy
  • (c)cheerful
  • (d)bold
  Answer(b) uneasy — 'apprehensive' means anxious about what may happen; 'uneasy' matches that worried feeling.
• practice — not a real PYQ

  Select the word nearest in meaning to 'agitated'.

  • (a)serene
  • (b)disturbed
  • (c)joyful
  • (d)idle
  Answer(b) disturbed — 'agitated' means troubled and restless, which 'disturbed' conveys.