Table:
0
A
B
C
D
E
1
City
Country
IATA
ICAO
Airport
2
Bangalore
India
BLR
VOBL
Bengaluru International Airport ^
3
Chennai
India
MAA
VOMM
Chennai International Airport ^
4
Colombo
Sri Lanka
CMB
VCBI
Bandaranaike International Airport [Hub]
5
Colombo
Sri Lanka
RML
VCCC
Ratmalana Airport ‡
6
Dubai
United Arab Emirates
DXB
OMDB
Dubai International Airport [T]
7
Jaffna
Sri Lanka
JAF
VCCJ
Kankesanturai Airport
8
Malé
Maldives
MLE
VRMM
Ibrahim Nasir International Airport [T]
9
Rome
Italy
FCO
LIRF
Fiumicino Airport [T]
10
Singapore
Singapore
SIN
WSSS
Changi International Airport [T]
11
Thiruvanathapuram
India
TRV
VOTV
Trivandrum Airport ^
12
Tiruchirappalli
India
TRZ
VOTR
Tiruchirappalli Airport [T]
13
Trincomalee
Sri Lanka
TRR
VCCT
China Bay Airport

Questions and formulas:
Question: What Country's ICAO is VOTR?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="votr"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,D2:D13="votr"),2))
Level: medium
Question: What is the City in the Maldives?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="maldives"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,B2:B13="maldives"),1))
Level: medium
Question: What is the ICAO in India with IATA TRZ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="india")*(C1="trz")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,(B2:B13="india")*(C2:C13="trz")),4))
Level: medium
Question: What is the Airport in Singapore?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="singapore"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,B2:B13="singapore"),5))
Level: medium
Question: What is the Airport with an IATA of TRZ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="trz"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,C2:C13="trz"),5))
Level: medium