The exercise aims for you to practice conjugation in PRESENT of the verb IR, which is an irregular verb, it means it doesn't follow a conjugation rule like other verbs. You need to notice that a conjugation is done with a personal pronoun or also nouns or names.
For example, answer 3 uses a name to conjugate, but answers 2 and 4 use a noun to conjugate (boyfriend and cousin respectively). The other answers use a personal pronoun.
Here is the conjugation of the verb IR in PRESENT.
Son las 8 de la mañana y yo calenté el café cuando me acorde de que es el cumpleaños de Alejandro, mi mejor amigo me vestí a toda prisa y salí corriendo al almacén tuve que encontrar un buen regalo para Alejandro
