Select the option that can be used as a one-word substitute for the given group of words.

Something which is worth believing

The correct answer is option 3), i.e., 'Credible.'

Key Points  

• Let's look at the meaning of the marked option:

  Word	Meaning
  Credible	able to be believed; convincing. (विश्वसनीय)

• Example:
  • The news report is hardly credible.
• ​Let's look at the meanings of the other given options:

  Word	Meaning
  Spurious	not genuine or authentic; false or fake. (जाली, नक़ली, मिथ्या)
  Expedient	useful or convenient in a particular situation, often without regard for what is fair or right. (उपाय)
  Impending	about to happen or occur soon. (आसन्न)

• Hence, from the given meanings, we find that 'Credible' is the correct one-word substitute.
• So, the correct answer is option 3.