Going to the Castle - Part 2

Probability Level 1

I was on vacation in England, and wanted to visit the Tower of London. The roads were laid out on a grid map, and and the castle was 4 blocks north and 5 blocks east. Unfortunately, there was some police activity near the hotel, and that intersection was blocked off so I could not go through it.

If I were to travel only north and east, how many routes did I have to get to the castle?

{ 3 \choose 1 } { 6 \choose 2 }

126 - { 3 \choose 1 } { 6 \choose 2 }

{ 3 \choose 2 } { 6 \choose 1 }

126 - { 3 \choose 2 } { 6 \choose 1}