Data Sufficiency — arrival order puzzle: who came last to the programme? Persons: Monika, Anita, Sonal, Ratna, Tanvy. Statements: I. Monika came after Anita but not after Tanvy. II. Ratna came after Tanvy but not after Sonal. Choose the correct sufficiency option.

Translate the statements

• I ⇒ Anita < Monika and Monika is not after Tanvy ⇒ Anita < Monika < Tanvy.
• II ⇒ Ratna > Tanvy and Ratna is not after Sonal ⇒ Tanvy < Ratna < Sonal.

Check sufficiency
Alone, I does not place Sonal or Ratna; alone, II does not place Anita or Monika ⇒ each is insufficient. Together, we can chain: Anita < Monika < Tanvy < Ratna < Sonal ⇒ last is Sonal. But the question asks data sufficiency per each statement individually.

Answer
Neither I nor II is sufficient (individually). (Both together would identify Sonal as last.)