I think I answered this. I went with the answer that was closest to what I did get. But, I am assuming that I should have gotten one of the answers listed.
You'd like to think so - and if you didn't, then you'd be marked wrong. However, for many decades (long before Internet) there have been questions out there that are completely and utterly wrong, and NONE of the answers have been correct.
Unfortunately, very often the questions are 'set' by someone with no electronics knowledge at all (for some reason English teachers were a common choice?) - and they simply get hold of old questions, complete with the answer sheets, and 'mix and match' the questions to create a 'new' exam paper.
In this way the faulty questions get perpetuated, and the Internet has only made this worse.
For an example, pre-Internet, I was in the final of the Sharp Electronics Engineer of the Year competition one year (I won it twice) along with a number of the brightest and best service engineers in the country. The final was held at a nice hotel somewhere, complete with events (like quad bikes, archery etc.), and the exam took place in the afternoon.
We all came out of the exam absolutely furious, because there was one such question - which we'd all seen before over the years, where none of the answers were right.
Luckily (or unluckily - depending on your point of view
) the Sharp staff (Technical Liaison Officers) were all there, so we instantly descended on the ones from our regions - mine was a nice guy called Mark Baxendale. Being brave, selfless employees of Sharp, every single one saved themselves and pointed at Jim Stone (I think that was his name?) who had set the paper, and claimed they hadn't even seen it
So we all surrounded Jim - who admitted getting the questions and answer sheets from old exam papers he managed to find - and had never checked them. He agreed to ignore that question, which further infuriated many of us (myself included) because we had worked out the correct answer, and written it in. I can't remember what he agreed to in the end, and I'm not 100% sure, but I 'think' that might have been one of the years I won
The prize that year by the way, apart from having the engraved cup for a year, was a 21 inch Stereo TV, a HFi Stereo VCR, and a Stereo System - even better, my boss was so happy I won it again, he replaced the 21 inch set with a 25 inch one