Some mangoes are yellow.
Some tixo are mangoes.

Conclusions:
(i) Some mangoes are green.
(ii) Tixo is a yellow.

Option A) "Counting the votes in an election to determine the next governor"  is the only one where data gathering is done.

In all other options, data is already collected and now analyzing of data is going on.

Primary care physicians or General practitioners (GP) are the one you go first to get a check up, and if they deem that your problem more severe than they can help you, they will send you to a secondary care physicians like specialists in Cardiologists, Neurologists, Dentists, ...

Hence, the given statement, Primary care physicians are responsible for diagnosis and treatment is TRUE.

A compound sentence is a sentence that has at least two independent clauses joined by a comma, semicolon or conjunction. An independent clause is a clause that has a subject and verb and forms a complete thought.

Here except option A) other two options dependent.

Hence, A) We can go see a movie, or we can get something to eat is a compound sentence.

The second would employ a comma, or semi-colon, and not a colon so it is not properly punctuated.

The third sentence would not be correct because it uses 'like', usually used for comparison. Since you are not comparing two questions, it would not be appropriate.

The fourth sentence has 'is' before the colon, which is a implies declaration and not listing. So, again, it would not be appropriate.

Hence, the first sentence, however, is punctuated correctly.

They is incorrect when talking of the television channel.

New is redundant.

And which must have a clear antecedent.

Hence, Only Option A satisfies and clears all the flaws in the given sentence.

We know there are 26 alphabets in English. The 21st letter in the alphabet is 'U'.

We have 5 vowels and 21 consonants.

Vowels :: A, E, I, O, U.

U is not consonant and is a vowel.

Hence, the given statement that 21st letter in the alphabet i.e, U is consonant is a FALSE.

False. Cube is not a Polygon.

Because polygon is a two dimensional figure and can be drawn on a flat surface whereas Cube is three dimensional figure and cannot be drawn on a flat surface.