Read the following group of phrases/sentences. The first and the last phrases/sentences are numbered 1 and 6, while the rest are numbered P, Q, R and S. Arrange these four phrases/sentences in proper order to form a meaningful sentence/paragraph.

1.   Delhi’s Indira Gandhi International Airport is the only one in the country to have runways equipped with a CAT IIIB Instrument Landing System.

P.   This technology guides pilots to land even when visibility is cut to 50 metres.

Q.  This is because

R.  Finding an explanation for a such failure won’t be easy.

S.  However, fails to operate often.

6.  The issue involves multiple stakeholders and a web of unclear briefs.