Fish belonging to species S in the deep sea have skins that are extremely black (ultra-black skin). This helps them not only to avoid predators but also sneakily attack their prey. However, having this extra layer of black pigment results in lower collagen on their skin, making their skin more fragile.

Which one of the following is the CORRECT logical inference based on the information in the above passage?  

For the past m days, the average daily production at a company was 100 units per day.

If today’s production of 180 units changes the average to 110 units per day, what is the value of m?

Consider the following functions for non-zero positive integers, p and q.

$\rm f(p,q)=\frac{p\times p\times p\times.......\times p}{q\ terms}=p^q;\;$; f(p, 1) = p

$g(p,q)=p^{p^{p^{p^{p^{..^{..^{..^{up\ to\ q\ terms}}}}}}}}$; g(p, 1) = p

Which one of the following options is correct based on the above? 

Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.

If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?