Answer:
The correct answer is:
- María es la segunda doctora aquí.
Step-by-step explanation:
The possibilities for each sentence are:
- María es la segunda doctora aquí. The conjugation of the verb and the grammar is the correct one.
- María es el segundo doctora aquí. María is a girl (ella) and segundo is masculine (used for a he) so the conjugation is wrong.
- María es la doctora segunda aquí. The conjugation is ok, but the grammar is wrong. segunda (sustantive) should go before the noun.
- María es una segunda doctora aquí. The sentence does not make sense.