Plz answer spanish speekers in need your help

Which one of the following is a trick used in spanish to identify the right hand? touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase b is your mano derecha. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano izquierda. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano derecha.

Fill in the el principal (beginning) tradidional del camino está en la frontera entre españa y

Mi hermano espera que el tren a tiempo. a. llegas b. llega c. llegue d. llegues