Which of the following were features of the postal system of India as described by Ibn Battuta?

1. The foot post carries a ringing bell in one hand.

2. The horse post is called uluq, stationed at a distance of every four miles.

3. The foot post or dawa has one station at every four kos of distance.

4. The foot post is quicker than the horse post.

Select the correct answer using the code given below: