Explanation:

Let's break down the relationship:

- The pattern:

6 : 646

4 : 190

5 : ?

- Notice:

For 6: 6 × 6 × (6 + 1) = 6 × 6 × 7 = 252 (but that isn’t 646)

Let's try: Six followed by 6² + 6 = 6 followed by (36+6) => 636? No.

Check calculation pattern: 6 × (6 × 6) + 6 = 6 × 36 + 6 = 216 + 6 = 222

Not matching.

- Let's check 4 : 190 pattern:

Try: 4 × (4 × 4) + 4 = 4 × 16 + 4 = 64 + 4 = 68

Not matching either.

- Let's look for alternate logic:

* If we split:

646 = 6 (number), then two times 6, then 4. 6 --> 4 --> 6

190 = 1, 9, 0 Which doesn't seem to form a sequence.

* Let's try concatenation:

6 : 646 (It seems like *6 to 4* to 6)

4 : 190 (There's ‘4’ in 190 (1+9+0 = 10))

- Try another calculation:

Check 6³ + 6 × 6 + 6 => 216 + 36 + 6 = 258

Not matching.

- Now let's just try the options for 5:

373, 377, 337, 376

Given, 4 : 190, 6 : 646

Is there any pattern like n, n², n so --> 6, 36, 6 as in 646,

and 4, 16, 0? But 416 doesn't match 190.

- Let's check:

Number × 100 + Number × 10 + Number

6 × 100 + 4 × 10 + 6 = 600 + 40 + 6 = 646

4 × 100 + 9 × 10 + 0 = 400 + 90 + 0 = 490 ?

6 × 100 + 4 × 10 + 6 = 646

4 × 100 + 9 × 10 + 0 = 490 ?

- Perhaps formula: n × 100 + (n+1) × 10 + n

For n=6: 6×100 + 7×10 + 6 = 600+70+6=676 ?

For n=4: 4×100 + 5×10 + 4 = 400+50+4=454 ?

- If it's just stylized as

For 6: 646

For 4: 190

Let's try 5: Option analysis:

- None seem to exactly match a clear formula above.

Given the options, let’s use the pattern to check for consistency:

- Let’s check difference between numbers as digits:

646 (digits add to 16)

190 (digits add to 10)

5 : ? (Next plausible sum: 10 down 6 = 4; But no. Try digits forming ‘373’)

* 373 (3+7+3 = 13)

* 377 (3+7+7 = 17)

* 337 (3+3+7 = 13)

* 376 (3+7+6 = 16)

Does the sequence suggest a pattern?

Let's take another pattern:

646 / 6 = 107.666…

190 / 4 = 47.5

373 / 5 = 74.6

Nothing exact.

Based on the list of options and series, it looks like Option 1: 373 does fit the type of pattern being presented (visually, 6-4-6, now with a possible 3-7-3 for 5).

Summary:

- Option 1: 373 — Similar visual repetition as 646, thus most consistent pattern.

- Other options do not follow the visual duplication style.

- Correct Answer: Option 1, 373.